GB1388143A - Keyboard encoder - Google Patents
Keyboard encoderInfo
- Publication number
- GB1388143A GB1388143A GB2203072A GB2203072A GB1388143A GB 1388143 A GB1388143 A GB 1388143A GB 2203072 A GB2203072 A GB 2203072A GB 2203072 A GB2203072 A GB 2203072A GB 1388143 A GB1388143 A GB 1388143A
- Authority
- GB
- United Kingdom
- Prior art keywords
- gates
- switch
- output
- pulses
- enabled
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
- H03M11/22—Static coding
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Input From Keyboards Or The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14386071A | 1971-05-17 | 1971-05-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1388143A true GB1388143A (en) | 1975-03-26 |
Family
ID=22505980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2203072A Expired GB1388143A (en) | 1971-05-17 | 1972-05-11 | Keyboard encoder |
Country Status (7)
Country | Link |
---|---|
US (1) | US3778815A (de) |
CA (1) | CA952033A (de) |
DE (1) | DE2224140B2 (de) |
FR (1) | FR2138053B1 (de) |
GB (1) | GB1388143A (de) |
IT (1) | IT955525B (de) |
SE (1) | SE371510B (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS536817B2 (de) * | 1972-04-04 | 1978-03-11 | ||
JPS5319374B2 (de) * | 1973-04-03 | 1978-06-20 | ||
JPS5086929A (de) * | 1973-11-30 | 1975-07-12 | ||
US4419769A (en) * | 1976-03-08 | 1983-12-06 | General Instrument Corporation | Digital tuning system for a varactor tuner employing feedback means for improved tuning accuracy |
US4157539A (en) * | 1976-10-14 | 1979-06-05 | The Singer Company | Charge rate, capacitive switch system |
US4326194A (en) * | 1979-04-16 | 1982-04-20 | The Singer Company | Dual encoded switching matrix |
JPS607808B2 (ja) * | 1979-08-24 | 1985-02-27 | 株式会社東芝 | キ−入力回路 |
US4667181A (en) * | 1983-07-15 | 1987-05-19 | Honeywell Inc. | Keyboard data input assembly |
US4673933A (en) * | 1983-11-14 | 1987-06-16 | American Microsystems, Inc. | Switch matrix encoding interface using common input/output parts |
US5189629A (en) * | 1990-06-06 | 1993-02-23 | Hughes Aircraft Company | Method of logic gate reduction in a logic gate array |
SE508136C2 (sv) * | 1996-12-19 | 1998-08-31 | Ericsson Telefon Ab L M | Anordning och förfarande för tangentbordsavläsning |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2610243A (en) * | 1951-04-06 | 1952-09-09 | Monroe Calculating Machine | Keyboard operated translating circuit |
US3307148A (en) * | 1962-04-16 | 1967-02-28 | Nippon Electric Co | Plural matrix decoding circuit |
US3541547A (en) * | 1968-03-15 | 1970-11-17 | Ibm | Code converter |
-
1971
- 1971-05-17 US US00143860A patent/US3778815A/en not_active Expired - Lifetime
-
1972
- 1972-05-08 CA CA141,611A patent/CA952033A/en not_active Expired
- 1972-05-11 GB GB2203072A patent/GB1388143A/en not_active Expired
- 1972-05-15 IT IT24359/72A patent/IT955525B/it active
- 1972-05-16 SE SE7206391A patent/SE371510B/xx unknown
- 1972-05-17 DE DE2224140A patent/DE2224140B2/de active Granted
- 1972-05-17 FR FR727217688A patent/FR2138053B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3778815A (en) | 1973-12-11 |
FR2138053B1 (de) | 1973-07-13 |
SE371510B (de) | 1974-11-18 |
DE2224140A1 (de) | 1972-11-30 |
DE2224140C3 (de) | 1974-11-28 |
CA952033A (en) | 1974-07-30 |
FR2138053A1 (de) | 1972-12-29 |
DE2224140B2 (de) | 1974-02-14 |
IT955525B (it) | 1973-09-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES345223A1 (es) | Un procedimiento para la transmision de informaciones o da-tos digitales. | |
GB1249542A (en) | A digital modulator | |
GB1388143A (en) | Keyboard encoder | |
GB1329466A (en) | Electronic keyboard input circuit | |
GB1227829A (de) | ||
GB1282228A (en) | Electronic circuit testing apparatus | |
GB1464912A (en) | Information input device | |
GB1432706A (en) | Electronic keyboard input circuit | |
GB981922A (en) | Data processing apparatus | |
GB1415469A (en) | Information input device | |
GB1025300A (en) | Improvements in or relating to digital signal detector circuits | |
GB1322068A (en) | System for encoding input signals | |
GB1203730A (en) | Binary arithmetic unit | |
GB1129659A (en) | Signal generating circuits | |
ES423903A1 (es) | Sistema electronico para el mando de ciclos. | |
GB1146278A (en) | Pulse train detection | |
ES318469A1 (es) | Un procedimiento utilizado en transmisiën de datos para elaborar un cëdigo definitivo | |
GB1486329A (en) | Information input and display apparatus | |
GB1434771A (en) | Logical circuits | |
ES400068A1 (es) | Perfeccionamientos en celulas para la realizacion de cir- cuitos de control de automatismo secuencial. | |
GB1388369A (en) | Keyboard input circuits | |
GB1250493A (de) | ||
GB1139381A (en) | Logic switching network | |
GB1169530A (en) | Telemeasuring Switch | |
GB1093702A (en) | Incremental displacement transducer circuits for errorless counting |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |